I didn't mean to insinuate that defenders don't ever make plays. I was simply stating that, on occasion, I see some very odd things from defenders.
Blowing coverage is fine, if someone is out of position or gets beat on a play...I'll never complain about that. What I was saying is that when a defender is in position, I've seen them stand there as a ball is lobbed basically through their helmet and they don't move a muscle...just stand there like a statue. It doesn't happen a LOT, but it does happen.